More features for tabbed windows

[Joerg Fischer]

> >It always was, and still is, possible to see 2 files at the same time 
> >in 2 different windows running in one nedit session.
> >  
> >
> Today, I do it this way :
> nc file1
> nc -untabbed file2

So you are running one nedit session!  However, in your previous post
you claimed that splitting windows vertically would be required for it. 

(Considering that splitting a window horizontally is already
implemented, but shows the same file again, the confusion is
perfect.)

Cheers,
Jörg